Plenty of Gas Left in Giant Dead Disk Galaxies
New findings suggest that they have a lot of gas – but then why are they not forming stars?
New findings suggest that they have a lot of gas – but then why are they not forming stars?
Star-forming galaxies have been eliminated as the top suspects for the origin of the IceCube neutrinos, leaving behind a dwindling list of unexpected possibilities.
Active galactic nuclei (AGN) and star-formation processes ionize gases around galaxies and the Universe. How can we separate the two to pin down the dominant ionizing sources in the early Universe?
When two observations share some common information, they can be “cross-correlated” to extract it. In today’s example, we discover what the matter halos and energetic phenomena in the Universe have in common through a cross-correlation.
In this article, the authors measure the stellar mass-metallicity relation for star forming galaxies ranging to z~2.3. They find that mass-metallicity relationship for these galaxies evolves with time and also that it flattens at late times.
This paper describes a new diagnostic that separates galaxies from AGN at much higher redshifts than the traditional BPT diagram.